大气CO2与温度升高对北方冬小麦旗叶光合特性、碳氮代谢及产量的影响

宗毓铮,张函青,李萍,张东升,林文,薛建福,高志强,郝兴宇

Effects of Elevated Atmospheric CO2 Concentration and Temperature on Photosynthetic Characteristics, Carbon and Nitrogen Metabolism in Flag Leaves and Yield of Winter Wheat in North China

ZONG YuZheng,ZHANG HanQing,LI Ping,ZHANG DongSheng,LIN Wen,XUE JianFu,GAO ZhiQiang,HAO XingYu

表5 CO2浓度和气温升高对小麦灌浆期叶片最大羧化速率和最大电子传递速率的影响

Table 5 Effects of elevated CO2 and increased temperature on Vc.max and Jmax of wheat at filling stage

处理 Treatment 最大羧化速率 Maximum carboxylation rate (Vc.max) (μmol·m-2·s-1) 最大电子传递速率 Maximum electron transport rate (Jmax) (μmol·m-2·s -1) Jmax/Vc.max CK 102.50±6.05a 103.78±9.45a 0.99±0.04b EC 102.63±8.49a 104.00±5.60a 0.98±0.03b ET 71.47±6.15b 60.43±6.58b 1.19±0.03a ECT 52.52±4.70b 44.83±3.67b 1.17±0.03a P-value PT 0.00 0.00 0.00 PCO2 0.18 0.28 0.65 PT×CO2 0.18 0.26 0.90